Envelop and the like for explosives.



A. BOEGKER. ENVELOP AND THE LIKE FOR EXPLOSIVES.

APPLICATION FILED NOV. 6, 1913.

Patented May 12, 1914,

To all whom it may concern:

Be it known that I, ARTHUR Bononnn,

rinrrnn strA'rEs PATENT o arian.

ARTHUR BonoKnn, or .BARMEN-RITTERSHAUSEN,' GERMANY.

ENVELOP AND LIKE FOR EXPLOSIVES.

" Specification of Letters Patent.

Patented May 12, 1914.

Application filed November 6, 1913. Serial No. 799,497.

manufacturer, subject of the German Emperor, resid1ng at Barmenltittershausen, Rhenish M Prussia, Germany, have invented I certain newand useful Improvements in Envelops and the like for Explosives, ofwhich the following is a specification.

Before being filled into or inserted, into shells, the explosivematerialsare furnished with an envelop of hard cardboard, which forms onthe one hand a padding or cushion between metal and explosive, and onthe other hand is intended to prevent chemical reaction, such as wouldtakeplace e. g. betweenpicric acid andiron. In order that these envelopsmay be made to oiier the requisite resistance for their purpose, theymust have a rather large thickness of wall, whereby of course the usefulspace in the envelops becomes limited in extent and the action of theshell is correspondingly weakened. The

present invention obviates this defect by providing an envelop whichinstead of consisting of the hitherto usual thick cardboard, consists ofa thin textile'material e. g. of muslin, linen or the like whichisstifiened by means of paper-pulp, dextrin, lac, gypsum or othersuitablematerial. The wall of the envelop may be formed either of one orof several layers of the materialchosen and by the application ofpressure or the like he given the desired form, which in virtue of itsstiffness, the wall retains. As material for the envelop the so-calledmuslin paper 7 (nesselpapier) may be advantageously emmeans that inboxes of e. Vg., 2O0 500 mm.

diam. and 700-1500 mm. length, such as are largely supplied for navalpurposes, there is an important increase in the explosive mate rialobtained.

When the explosive is poured into the new envelop, the latter is laid inthe pouring mold and, owing to the flexibility of the prepared textilematerial, exactly fits the wall of the mold. This is not the case withthe hard cardboard boxes hitherto used.

' When the envelop is to be employed for solid explosive bodies, it isfilled-in the same manner as the cardboard boxes, 2'. 6., the envelop isdrawn over the explosive and then closed by means of a' lid or cover.The envelop may, however,.havea vertical subdiv1s1on and be providedwlth a narrow adhesive, joint or seam. There are half-rings or disks ofcardboard arranged above and below which correspond and fit against oneanother when the halves of the vertically divided casing are applied tothe sides of the explosive and stuck together along the joints. The halfrings or disks above and below may be then connected by means of wholerings or disks which are stuck on. In the case of cardboard boxes thethick walls prevent this. Preparation with oil and so forth such as iscustomary in the case of cardboard boxes can likewise be carried out, ineach case to suit the material chosen.

One example of a two-part envelop in accordance with the presentinvention is shown in the accompanying drawing, wherein- Figure 1 is avertical section of the envelop, and Fig. 2 a plan.

Here a, a are the two semi-conoidal halves of the envelop-wall, whichconsist of im-' pregnated textile material, and are given their desiredform by the application of pressure. Adhesively attached to them aboveand below are circular end pieces I) and 0 similarly constituting thebase piece and tip piece ofthe envelop respectively.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is:

1. An envelop for explosives consisting of a conoidal body adapted tofit the interior of a conical shell and two flat end pieces, the bodybeing composed of light flexible material saturated with stiflt'eningmaterial, the same being in separable sections normally adheringtogether in use.

2. A conoidal envelop for explosives for In testimony whereof, I havesigned my shells co-nslstmg of two longitudinal sem1 name to thisspecification 1n the presence of conoidal sections of light flexiblematerial two subscribing Witnesses.

saturated With stiffening material and two ARTHUR BOECKER. [11. s]correspondingly divided circular pieces con- Witnesses: stituting theend-piece and tip-piece of the HELEN l UFER,

envelop respectively. ALBERT Norm.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

